The Percentage of Red Blood Cells in a Sample of Human

Question

The percentage of red blood cells in a sample of human blood is normally about
A) 15%.
B) 30%.
C) 45%.
D) 60%.
E) 80%.

Accepted Answer

The normal range for the percentage of red blood cells in human blood (known as the hematocrit value) is 40-50% for men and 35-45% for women, with an average of 45%. Therefore, choice C (45%) is the most accurate answer. The other choices are either too low (A and B) or too high (D and E) to be correct.